docs: def is_searchable(self):
          """A bool value that indicates whether the person has enough data and
          can be sent as a query to the API."""
          filter_func = lambda field: field.is_searchable
          return bool(filter(filter_func, self.names) or 
                      filter(filter_func, self.emails) or
                      filter(filter_func, self.phones) or
                      filter(filter_func, self.usernames))